Uncertainty in velocity measurement based on diode-laser absorption in nonuniform flows
文献类型：期刊论文
| 作者 | Li F(李飞) ; Yu XL(余西龙); Cai WW; Ma L
|
| 刊名 | APPLIED OPTICS
 |
| 出版日期 | 2012-07-10 |
| 卷号 | 51期号:20页码:4788-4797 |
| 通讯作者邮箱 | linma@vt.edu |
| 关键词 | Wavelength-Modulation Spectroscopy Water-Vapor Temperature Distributions Scramjet Combustor Gas Temperature Parameters Pressure Sensors |
| ISSN号 | 1559-128X |
| 产权排序 | [Cai, Weiwei;Ma, Lin] Virginia Tech, Dept Aerosp & Ocean Engn, Blacksburg, VA 24061 USA; [Li, Fei; Yu, Xilong] Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China |
| 通讯作者 | Ma, L ; Virginia Tech, Dept Aerosp & Ocean Engn, Blacksburg, VA 24061 USA. |
| 合作状况 | 国际 |
| 中文摘要 | This work investigates the error caused by nonuniformities along the line-of-sight in velocity measurement using tunable diode-laser absorption spectroscopy (TDLAS). Past work has demonstrated TDLAS as an attractive diagnostic technique for measuring velocity, which is inferred from the Doppler shift of two absorption features using two crossing laser beams. However, because TDLAS is line-of-sight in nature, the obtained velocity is a spatially averaged value along the probing laser beams. As a result, nonuniformities in the flow can cause uncertainty in the velocity measurement. Therefore, it is the goal of this work to quantify the uncertainty caused by various nonuniformities typically encountered in practice, including boundary layer effects, the divergence/convergence of the flow, and the methods used to fit the Doppler shift. Systematic analyses are performed to quantify the uncertainty under various conditions, and case studies are reported to illustrate the usefulness of such analysis in interpreting experimental data obtained from a scramjet facility. We expect this work to be valuable for the design and optimization of TDLAS-based velocimetry, and also for the quantitative interpretation of the measurements. |
| 学科主题 | 实验流体力学 |
| 分类号 | 二类 |
| 收录类别 | SCI ; EI |
| 原文出处 | http://dx.doi.org/10.1364/AO.51.004788 |
| 语种 | 英语 |
| WOS记录号 | WOS:000306291100028 |
| 公开日期 | 2013-01-18 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/46552]  |
| 专题 | 力学研究所_高温气体动力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Li F,Yu XL,Cai WW,et al. Uncertainty in velocity measurement based on diode-laser absorption in nonuniform flows[J]. APPLIED OPTICS,2012,51(20):4788-4797. |
| APA | Li F,Yu XL,Cai WW,&Ma L.(2012).Uncertainty in velocity measurement based on diode-laser absorption in nonuniform flows.APPLIED OPTICS,51(20),4788-4797. |
| MLA | Li F,et al."Uncertainty in velocity measurement based on diode-laser absorption in nonuniform flows".APPLIED OPTICS 51.20(2012):4788-4797. |
入库方式： OAI收割
来源：力学研究所
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